Originally Posted by Rock Sexton
Why do the Marauders have to be sent by Thanos? It's not even Asgard they're attacking. The prequel comic clearly establishes that all the realms are chaotic with different factions trying to take advantage of the fact that the bifrost was kaput.
Taking advantage of the broken bifrost seems to fall in line with the role Asgard seems to play in policing the realms...we saw this in the first movie, when they came to Midgard to deal with the Jotuns. Broken bifrost = time for chaos.
Still, I do wonder what reason the Dark Elves have to come to Earth for. The Tesseract is back on Asgard, and so are all the other goodies in Odin's treasure room...